展平Python字典并仅在不唯一时更改关键点

def flatten_dict(dictionary):
    flattened_dict = {}
    for key, value in dictionary.items():
        if isinstance(value, dict):
            # 递归展平嵌套字典
            nested_dict = flatten_dict(value)
            for nested_key, nested_value in nested_dict.items():
                # 拼接键值对的键
                new_key = f"{key}.{nested_key}"
                flattened_dict[new_key] = nested_value
        else:
            flattened_dict[key] = value
    return flattened_dict

def change_key_value(dictionary, key, new_value):
    if key in dictionary:
        dictionary[key] = new_value

# 示例字典
example_dict = {
    "a": 1,
    "b": {
        "c": 2,
        "d": {
            "e": 3,
            "f": 4
        }
    },
    "g": {
        "h": 5
    }
}

# 展平字典
flattened_dict = flatten_dict(example_dict)
print(flattened_dict)

# 更改关键点的值
change_key_value(flattened_dict, "b.c", 10)
print(flattened_dict)

{
    "a": 1,
    "b.c": 2,
    "b.d.e": 3,
    "b.d.f": 4,
    "g.h": 5
}
{
    "a": 1,
    "b.c": 10,
    "b.d.e": 3,
    "b.d.f": 4,
    "g.h": 5
}